# Article

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Keywords:
weak initial compactness; ${\mathfrak m}$pcap; $[\mu ,\kappa ]$-compactness; pseudo-$(\kappa ,\lambda )$-compactness; covering number
Summary:
The statement in the title solves a problem raised by T. Retta. We also present a variation of the result in terms of $[\mu ,\kappa ]$-compactness.
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